Warranty Main frames: Life time Moving arms: 3 years linear bearings, springs, adjustments: 3 year WarrantyMain frames: Life timeMoving arms: 3 yearslinear bearings, springs, adjustments: 3 years Hand grips, upholstery pads and rollers, all other parts (including end caps): 2 yearsCheck the below chart for reference,² 19mm thick plywood backing, followed by 38mm thick foam core, covered by ...